The control or operating mode selected shall override all other control or operating modes, with the exception of the emergency stop.
If the machinery or related product has been designed and constructed to allow its use in several control or operating modes requiring different protective measures and/or work procedures, it shall be fitted with a mode selector, which can be locked in each position. Each position of the selector shall be clearly identifiable and shall correspond to a single operating or control mode.
The selector may be replaced by another selection method, which restricts the use of certain functions of the machinery or related product to certain categories of operator.
If, for certain operations, the machinery or related product shall be able to operate with a guard displaced or removed and/or a protective device disabled, the control or operating mode selector shall simultaneously:
- a)disable all other control or operating modes;
- b)permit operation of hazardous functions only by control devices requiring sustained action;
- c)permit the operation of hazardous functions only in reduced risk conditions while preventing hazards from linked sequences;
- d)prevent any operation of hazardous functions by voluntary or involuntary action on the machinery’s or related product’s sensors.
If these four conditions cannot be fulfilled simultaneously, the control or operating mode selector shall activate other protective measures designed and constructed to ensure a safe intervention zone.
In addition, the operator shall be able to control the operation of the parts he or she is working on from the adjustment point.